Hybrid Jaguar supercar, anyone? Yours for £700,000-plus, though you'll save your VED payments, if you want to put your name down for one of the 250 that Jaguar will build.

We're talking about the C-X75, a beast capable of 200mph and beyond, yet pumps out less than 99g of CO2 each kilometre it drives.

Jaguar showed off the C-X75 as a concept back in September 2010 at the Paris Motor Show. Back then, the emissions target was a mere 28g/km, so we guess the petrol-burning micro-turbines aren't quite as efficient in the flesh as the boffins' slide-rules suggested. Either way, the production model "will use a state-of-the-art, small-capacity, highly-boosted internal combustion engine with one powerful electric motor at each axle".